PsiPlus

PsiPlus is a free, open-source instant messaging client for the XMPP (Jabber) protocol. It is a fork of the Psi project and is developed by a community of volunteers to extend functionality through a modular plugin system and a customizable user interface. The client is designed to be cross-platform, with a graphical user interface built on a Qt-based framework, allowing it to run on Windows, Linux, and other Unix-like systems.

A central feature of PsiPlus is its extensible plugin architecture. Users can enable or disable plugins to tailor the experience, adding capabilities such as enhanced notifications, improved contact and roster management, and additional chat enhancements. Core messaging functions cover multi-account support, presence information, one-to-one chats, and group chats (MUC). The client also supports common XMPP features like contact lists, search, and message history with basic organization and retrieval.

Security and privacy in PsiPlus are typically addressed through optional plugins and configurations. Users can employ encryption plugins and other security tools according to their needs, with the understanding that plugin availability and support can vary by release. The project emphasizes user customization and community-driven development rather than a single rigid feature set.

In practice, PsiPlus has been distributed through various platforms and package repositories, with official builds and third-party forks providing binaries for different operating systems. Development activity has varied over time, reflecting the collaborative nature of open-source projects and the presence of multiple forks and maintenance efforts within the XMPP client ecosystem.